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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), in ... | $6,959,801 | $7,603,124 | $7,129,303 | $7,946,409 | $6,859,642 | $5,990,738 | $5,581,596 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $2,743,304 | $2,819,914 | $2,557,293 | $2,331,578 | $1,790,244 | $1,682,742 | $1,804,083 |
| Total | $9,703,105 | $10,423,038 | $9,686,596 | $10,277,987 | $8,649,886 | $7,673,480 | $7,385,679 |
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